Support for concaves.



nements. r L

UNITED STATES .Patented septexiber i ois,

PATENT Orifice. i

SUPPORT son Genomes.

SPECIAEICTION forming partei Letters Patent No. 740,215, dated September 29, 1903.

Application Sled Ik! 9. 1902.

To all when:I z' muy concern:

Be it; known that I, WILLIAM E. Bnnrno- LOW, a cition of the United States, residing nt Salem, in 4the conntyo( McCook and Stato of South Dakota, hnve invented certain new and useful Improvements in vSupper-'ts' for Concnves; and Il do declare the following to he :t lfull, clear, and exact description of the invention, such as will enable others skilled in the nrt to which it nppertnins to make and nso the same.

The invention relates to n yielding snpport'l'or the concnves of threshing-mschincs.

The object of the invention is to provide a support whiclris simple of construction, ef-

. fectivo in action, nud design-ed to allow thc concave to yield or drop down when liabilit)- of choking the cylinder and concave occurs, as when a com pact mass of heavy or wet grain is fed into the concave, thus relieving 'the concave and cylinder of excessive strain nnd obvieting danger of injury thereto.

With this :ind other objects in View, `which will readily appear as the nature of the invention is better understood, said invention consists in certain novel features of construction and combination nndvarrnngementof parts which will be hereinafter v'fully described, defined in the appended claim, and illustrated in the accompanying drawings, in which* Figure 1 is a vertical transverse section through the chamber of a threshingcylinder,A

showing the application of the invention. Fig. 2 is s vertical longitndinalsecton of the saine. Fig. 3 is a. vertical transverse section ou line 3 3 of Figi. Fig. 4 is a sidedetail ele'- vation showing one of the resistance-springs and connections.

Referring new more particularly to the drawings, the numeral 1 represents segmental supporting-arms provided with longitudinal grooves a to receive the side edges of the concave 2, which is inserted in and withdrawn from said grooves by an endwise-sliding movement.

The rear ends of the arms 1ere hinged or pivoted, as shown at 3, to the threshebframe, so that the support. may swing within a prescribed srein a. vertical plane, and the front ends of the arms have depending therefrom links 4. These links connect the arms with Serial No. 196.526. ill'o model.)

lcrftnks 5 on n. rock-shaft G, which er transversely of and is journeled in *E of the frame. The Vslinit is provi-end ends, which projectt-o the exterior, with: cranks 'Lpivotally connected to nrms 8,. non slide vertically on gnide rods vorbolts lgvnose lower portions are Vscrew-thresided sin" in threaded openings in guide brackets il', 6e to the frame. Surrounding eet-.l1 gni or boltis n coil-spring 11, which bes rs :ze: f the arm S, and engaging the threat foce of the rod or bolt is nn adjusting-r by means of which the tension or rosistnnco 6g of the'spring to the downward movement oi the srm'i` may be regulated. ltn'ill tlv e Seen that the tivo springs lt yieldinj ;ioold the concave and concnvcsnpport in their mal positions in `which the concave is spaced 'fo the usual distance from its cylinder.

W'lien a nisse of grain too heavy for the cylinder to handle is fed into the concave, t' e increased pressure en the concave forces concave and nrms downward and rocks shaft G in one direction against the resi of the springs 11, thereby increasing tivitnnce between -e eoncnve and c lir. giving the m` of grain freedom. o and loosen up oy which the concave i Se cylinder nre relieved of strain and the 'letter permitted to freely operate to tl: rese ine grain and clear the concave. As soon :is tire amount of grain remaining in the concave is deereasedloihe normal the spriugsll expand, rocking the shaft G in the reverse direction and forcing the cranks 5 and upward and restoring the concave and arms to their nor.- inal positions.

By the use of the shaft G and b vnionnting the parts in the manner described the pressure of the springs is equally distributed and the concave :accurately balanced.

From the foregoing description, taken in connection with the accompanying drawings, it is thought that the construction, mode of operation, and advnntagesof my improved support will be readily npparent without reqnirinf7 a. more extended explanation.

'arions changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principie or sacrificing any of the advan tages of his invention.

2V l' f '30,215

Having thus described my invention, what of the threshfr-fmme, the afh K I daim as' new, and desire to secure by Lett-ers l vericaly-mombe guided mzze aaen, ised to the adjacent. duim' crauk-- rm,

InannutomaticnHy-adjnsmbe noncavefor resisting the downward moveme- 5 threshing-machines, the combnmomA wthfa member, and means-for rgulaly in fabel-Imaam of segmental arms pivote@ sion of said spring, substantif; an om: -oud to said frame, a concav support.' scribed.

ed by said arms, n rock-Shaft journaled n vIn. tespmonywheof I have h the imma and having exteriory-projectng my hand in 'presence of hummm" ro ends and tvy sms of crank-arms, one be?J nesses.

vrlhu :md the other without the frameJuks XYILLAM E. A'' connecting the free ends of lthe segmental Witnesses: arms to the rstfnamed ser of Acramiazrms, E. 1I. XVILSON, and variable rssm'nce means on eac-h sd'e H. L. Gmmx. 

